Cooperative Caching in Wireless P2P Networks: Design, Implementation and Evaluation

Abstract

Some recent studies have shown that cooperative cache can improve the system performance in wireless P2P networks such as ad hoc networks and mesh networks. However, all these studies are at a very high level, leaving many design and implementation issues unanswered. In this paper, we present our design and implementation of cooperative cache in wireless P2P networks, and propose solutions to find the best place to cache the data. We propose a novel asymmetric cooperative cache approach, where the data requests are transmitted to the cache layer on every node, but the data replies are only transmitted to the cache layer at the intermediate nodes that need to cache the data. This solution not only reduces the overhead of copying data between the user space and the kernel space, it also allows data pipelines to reduce the end-to-end delay. We also study the effects of different MAC layers, such as 802.11-based ad hoc networks and multi-interface-multichannel-based mesh networks, on the performance of cooperative cache. Our results show that the asymmetric approach outperforms the symmetric approach in traditional 802.11-based ad hoc networks by removing most of the processing overhead. In mesh networks, the asymmetric approach can significantly reduce the data access delay compared to the symmetric approach due to data pipelines.

Existing System:

In Existing System, a wireless P2P network may consist of several source peers and a group of downloading peers. Each officer has a relatively powerful data center, and the downloading peers need to access the data centers to get needed files. And suppose the source is very long distance from downloading peers means the download process taking much more time. The neighboring peers tend to have similar downloading process and thus share common interests. If one peer has accessed a data item from the data center, at that time another peer download the same file means it make delay.

Proposed System:

In Proposed System, we present our design and implementation of cooperative cache in wireless P2P networks, and propose solutions to find the best place to cache the data. We propose a novel asymmetric cooperative cache approach, where the data requests are transmitted to the cache layer on every node, but the data replies are only transmitted to the cache layer at the intermediate nodes that need to cache the data. This solution not only reduces the overhead of copying data between the user space and the kernel space, it also allows data pipelines to reduce the end-to-end delay. cooperative caching , which allows the sharing and coordination of cached data among multiple nodes, has been applied to improve the system performance in wireless P2P networks.

 

System Requirements:

SOFTWARE REQUIREMENTS

n  Language : Java, swing

n  Back End Tool: SQL SERVER 2000

n  Operating System: Windows 98 and more.

HARDWARE REQUIREMENTS

n  Processor : Intel Pentium III Processor 

n  Random Memory: 128MB

n  Hard Disk :20GB